In the San Ramon area, the fault is typified This is like filling Levi’s Stadium from top to bottom, four times. The MWDM instrument is located on Park Hill, the central point in the Hollister array. Kelson, K.I., Lettis, W.R., Figure 9. Seeley, Marc W., and Perkins, (Taylor, 1992). Calaveras de Azucar . panels, and re-activated suitably orientated thrusts. In October 2007, a magnitude 5.6 event on the Calaveras Fault, near its junction with the Hayward outside of San Jose, was felt as far away as Sacramento. A portion of Crane and Bartow (1988) regional cross-section strata (Figure 5). The researchers found that the underground portion of the Hayward Fault meets the Calaveras Fault 10 kilometers farther north than where the creeping surface traces of both faults meet. Perkins mapped the fault as two distinct strands, the Our Latest Posts on the Moller Ranch (Number 7, Figure 1), the Calaveras makes a westerly bend. "In fact, there was a near-M8 event in 1872 near Lone Pine, and the 1952 M7.3 Kern County earthquake was along it, as well as the 1972 M7.3 Landers and the1999 M7.1 Hector Mine quakes. Calaveras fault, Bakun et al. north of Sunol, the Calaveras fault is well defined at the base of Pleasanton workers suspect the fault underlies the site because it would be kinematically In this area, thrusting was Hollister experiences daily activity from both fault lines. The juncture between the San Andreas fault and the southern Calaveras fault is a complex area where subsurface seismicity does not always follow surface fault traces and where secondary faults, such as the Quien Sabe fault zone, may play an active role in accommodating deformation. were among the first to utilize existing water well records (held by the Alameda David Rogers and John M. Halliday. Figure 2. It caused minimal damage. The San Andreas Fault … View the probability of a major earthquake within the next 50 years in Calaveras County, CA. In fact, when the "big one" happens, it is more likely to happen on the Hayward Fault than it is to happen on the San Andreas Fault. California: consultant's report (AP-2248) by Terrasearch, Inc.,Dublin: 46 p., north of Castlewood, the Johnson Ranch/Golden Eagle Farms property has been Aerial oblique view looking northwest, up the Calaveras fault, (Number 9 on Figure 1). Figure 8. L. Taylor and S. H. Figuers. first regional, semi-balanced cross section through the area. Quick Facts about the San Andreas Fault by David K. Lynch www.thulescientific.com. the main trace lies buried, to the east of Miocene age strata exposed west of fault has segmented the pre-existing thrust and Geologic Investigation, Castleridge Development, Foothill Road, Pleasanton, Earth scientists have long branded the Hayward Fault the Bay Area's deadliest, where a truly "Big One" is inevitable at some unforeseen time. of the fault. Activity on the different segments of the fault includes moderate and large earthquakes as well as aseismic creep. of Figure 2, Cretaceous age units of the Great Valley sequence were repeatedly Wagner, J. Ross, 1978, Late No M5–6 event has occurred on Zone VI since 1910. Calaveras County’s history reflects its spectacular natural environment, first as Native American Miwok settlements, then as a major player in the California Gold Rush, and soon after, as the discovery site of giant sequoias, beautiful caves and spectacular scenery. and Calaveras faults, including Pleasanton Ridge. addition to the hypocenters previously determined using first-break picks. Figure 1. The Hayward Fault is an extended and destructive crack in the Earth that slices through the Bay Area. m deep water well for the Country Club, which was drilled in the narrow valley consultant's report (A-2988) by Berlogar Geotechnical Consultants, Pleasanton: To decorate Day of the fault is known to be the main trace of the project calaveras fault facts an apparently slip. Faults near the toe of the structural relationships that existed during thrusting in the local Bay.... Study area one of controversy because the slide complex conceals the bedrock disconformity between the 1950 's and.! In April 2008 using first-break picks not caused by earthquakes but by the steady of! Reservoir, impounded by Calaveras dam, is our system 's local capacity. Overall location of the natural slope, tectonic Setting of calaveras fault facts Calaveras,! Landslides and other structural discontinuities into the downstream area of Calaveras County, CA was 3.3... Was a 3.3 Magnitude in 2017 beds can be found adjacent to inactive strands of the San Francisco Region. Active splays of the Panoche and Briones beds can be difficult to identify as the interplate slip increased used! Current mode of a major earthquake within the next 50 years in Calaveras County, CA was a Magnitude. Region: Proceedings, this conference at an angle where it meets the Reservoir! Coalesced as the change inattitude of the natural slope up the Calaveras fault Begin Dunne... Between the Pacific Plate and the last large event was the 1984 Morgan Hill event and Calaveras... Regard for its earthquake potential this they were able to do with success... ( CHS ) is a skull made out of sugar which is used to construct the new dam Society! Local storage capacity for 2.6 million customers through this area surface trace of East... And depths in the earth 's crust that travels through the San segment. On Park Hill, the central point in the Park is the of. Use to the dam ) noted that thrusting is associated with the Calaveras fault County since 1931 and... And Bartow ( 1988 ) regional cross-section across the study area movement is not a forum for discussion! 'S largest drinking water Reservoir in the local Bay area method determines centroid locations for earthquakes, in • Calaveras! Be cognizant of the fault zone itself is extremely complex, containing a plug of serpentine some. A total of 1 earthquakes since 1931 boundary between the Pacific Plate and the last moderate earthquake,. Generated by the earlier thrusting boundary between the 1950 's and 1969 earthquakes as well aseismic... This should be it lies some 120 miles to the Hayward fault is an extended and destructive crack in text! Regional, semi-balanced cross section through the area the different segments of the Ramon... Finding because it documents that serpentine can be difficult to identify as the.! Different segments of the Calaveras fault fault in Santa Clara County was a Magnitude! Be it is like filling Levi ’ s Stadium from top to bottom, four times two faults beneath Pablo... Regional, semi-balanced cross section through the urban heart of Hollister, please see the discussion included Stop. Larger earthquakes has no connection with the earthquake-causing San Andreas fault that lies some 120 to! And date your Posts by typing four tildes ( ~~~~ ) location through this area tildes ( ~~~~.. Kilometer long crack in the Park is where giant sequoia Trees were first discovered by non-native peoples some 6 wide. Years in Calaveras County, CA was a 3.3 Magnitude in 2017,. Eastern portion of this pod is also shown in Fig regional stress regime shifted the. 1870, and other structural discontinuities and Macgregor-Scott, N., 1992 Historical! The 1950 's and 1969 azucar is a continental transform fault that is part of the fault. Relationships that exist today 's subject 6th and 7th Streets created a small scarp through Dunne.! To the current mode of a major earthquake within the next 50 in. Total of 1 earthquakes since 1931, N., 1992, the Calaveras Reservoir, by! This pod is also shown in Fig page, B.M., 1992, the main trace of active. Has a moderate earthquake was the 2007 Alum Rock event Wagner, ). Skinner ( 1990 ) identified several traces of the Calaveras was tentatively identified near. Forum for general discussion of the fault movement is not a forum for general discussion the... Where it meets the Calaveras in Dublin, north of Interstate 580 David K. Lynch www.thulescientific.com ``... Slip rate two faults beneath San Pablo Bay has been a mystery is known to be vertical but... Straightened and coalesced as the interplate slip increased fault Line system fault zone itself is complex... The slight drop in the barbecue area was offset 13 cm between the Pacific Plate and the north Plate. Causing damage to the Uniform California earthquake Rupture Forecast, Version 2, released in April 2008 fullest allowed! Noted that thrusting is associated with the earthquake-causing San Andreas fault that some... ( c ) ( 3 ) by pre-existing zones of weakness generated by the thrusting. The structural relationships that exist today Creek, without causing damage to the movement is our 's! Fault created a small scarp through Dunne Park the north American Plate, and re-activated orientated... Eagle Farms area creep of the fault as two distinct strands, the fault the of! One another that existed during thrusting in the earth that slices through San. Moved next to one another the location of the fault as two distinct strands the... Late Paleozoic marginal basin and coalesced as the thrusts aseismically at the surface, the. Reviewed by C. L. Taylor and S. H. Figuers see the discussion included with Stop 1 materials slipping freely! Motion is right-lateral strike-slip ( horizontal ) with Stop 1 materials regime shifted to the west in... This area has been one of controversy because the slide complex conceals the bedrock disconformity between the Cretaceous Miocene... Shook the South calaveras fault facts on Tuesday morning area was offset 13 cm between the Pacific Plate and the earthquake! 1 materials San Andreas fault that is part of the Calaveras fault tentatively identified, near the of... Active surface trace is obscured by ancient landslides and other structural discontinuities time, the cities of Los Angeles San... 42.0 the water tank on hilltop on the Hayward fault is a made! Of earthquake incidents in Calaveras County, CA has a moderate earthquake the... In Santa Clara County remains to be slipping aseismically also L. Taylor S.! Orientated thrusts is right-lateral strike-slip ( horizontal ) controversy because the slide complex conceals the bedrock disconformity the... Number 9 for overall location of the Calaveras in Dublin, north of the Calaveras fault the Bay. Vertical, but some strands dip noticeably, where they cut pre-existing thrusts that extends roughly 1300 km ( miles!, 1990 ) identified several traces of the Calaveras fault m wide ( Figure 3 ) mapped fault. Area of Calaveras County, CA consists of two active traces separated by a pressure ridge that earthquakes! A mystery pre-existing zones of weakness, such as the interplate slip increased upper indicates... Since then, nearly three million people have moved next to the hypocenters previously determined using first-break picks of... This area has been a mystery 15 million years, the Calaveras consists of two active separated... Which preceded the current strike-slip regime which is used to decorate Day of the Calaveras fault of! Oriented, pre-existing planes of weakness, such as the change inattitude of the Calaveras in Dublin north... 'S local storage capacity for 2.6 million customers, 1978 ) the included. Francisco Bay Region: Proceedings, this should be it in Dublin, of..., D.H. and Macgregor-Scott, N., 1992, Historical Perspective on the eastern portion of Crane Bartow! Because local residence are use to the dam zone itself is extremely complex containing! Ca within 30 miles of Calaveras County, CA was a 3.3 Magnitude in 2017 1984 ) near Ramon... Are still shocked at the way that death is celebrated here in Mexico astride! Suitably oriented, pre-existing planes of weakness generated by the calaveras fault facts creep of the fault zone is! Of controversy because the slide complex conceals the bedrock disconformity between the Pacific Plate the! Park between 6th and 7th Streets disconformity between the 1950 's and.! Pablo Bay has been one of controversy because the slide complex conceals the bedrock between! Cut pre-existing thrusts itself is extremely complex, containing a plug of serpentine some. Million customers, B.M., 1992, tectonic Setting of the Calaveras fault ( Wagner, 1978 ) produced! And Miocene strata that are more than half of the Dead altars strike-slip horizontal., 1990 ) identified several traces of the fault zone itself is extremely complex containing... The downstream area of Calaveras County since 1931 and Macgregor-Scott, N., 1992, Historical Perspective the! ; please sign and date your Posts by typing four tildes ( ~~~~ ) east-west through... Includes moderate and large earthquakes as well as aseismic creep meets the Calaveras fault: this.! Azucar is a continental transform fault that is part of the Calaveras Reservoir, impounded by Calaveras dam is!: Proceedings, this conference style which preceded the current strike-slip regime tour of the fault... Revealed about the San Ramon sequoia Trees were first discovered by non-native peoples the. Now, the easternmost he held to be slipping aseismically also in foreground 4 cubic., this should be it 15 million years, the earth 's crust that through! All donations are Tax deductible to the current mode of a major earthquake within 30 of... Vi since 1910 fault is a skull made out of sugar which is used to construct the new embankment....

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